(d)
Temporarily attach the hoses to prevent movement.
(e)
Remove the red-colored 69B41424-1 union near each of the pitot-static probe's S2 flexible hose and replace the hose with an MS21902D6 union.
S 033-018
(13) At STA 680 on the left and right sides of the forward cargo compartment, disconnect the alternate static pressure ports (two ports) from the pitot-static system:
(a)
Disconnect the hoses from the alternate static pressure ports.
(b)
Install dust caps on the alternate static pressure ports.
(c)
Install pressure caps on the static hoses.
(d)
Temporarily attach the hoses to prevent movement.
S 033-019
(14) At STA 2367 on the left and right sides of section 48, disconnect the dedicated static pressure ports (two ports) from the pitot-static system:
(a)
Disconnect the lines from the dedicated static pressure ports.
(b)
Install dust caps on the dedicated static pressure ports.
(c)
Install pressure caps on the static lines.
S 033-020
(15) At STA 260 in the forward left and right crawlways, remove the drain assemblies (four drains) from the pitot-static system:
(a)
Remove all of the drain assemblies and quick disconnects.
(b)
Install the plugs on the drain lines.
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S 033-896
(16) In the electrical and electronics compartment, remove all of the drain assemblies (six drains) from the pitot-static system:
(a)
Remove all of the drain assemblies and quick disconnects.
(b)
Install the plugs on the drain lines.
S 033-022
(17) At STA 400 on the left and right sides, remove all of the drain assemblies (ten drains) from the pitot-static system:
(a)
Remove all of the drain assemblies and quick disconnects.
(b)
Install plugs on the drain lines.
S 033-023
(18) At STA 740 on the left side of the forward cargo compartment, remove all of the drain assemblies (three drains) from the pitot-static system:
(a)
Remove all of the drain assemblies and quick disconnects.
(b)
Install plugs on the drain lines.
S 033-024
(19) At STA 1980 on the right side of the bulk cargo compartment, remove all of the drain assemblies (two drains) from the pitot-static system:
(a)
Remove all of the drain assemblies and quick disconnects.
(b)
Install plugs on the drain lines.
F. Flush the Captain's Pitot System
S 283-025
(1)
Make sure that the upper left pitot-static probe, the left air data computer and all of the drain assemblies are disconnected from the captain's pitot system.
S 493-243
(2)
In the electrical and electronics compartment, remove the plug from drain line No. 16 (Fig. 301) and connect the air supply.
S 033-027
(3)
In the electrical and electronics compartment, remove the pressure cap from the pitot hose disconnected from the left air data computer.
S 173-028
(4)
Flush from the air supply through pitot line with dry filtered air, 20 to 30 psi, for 2 minutes.
NOTE: Make sure that you can feel air come out of the line to show
____
that line is not cross connected.
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S 433-029
(5)
Replace the pressure cap on the pitot hose disconnected from the left air data computer.
S 033-030
(6)
At STA 400 in the left crawlway, remove the plug from drain line No. 10 (Fig. 301).
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本文链接地址：747-400 AMM 飞机维护手册 导航 NAVIGATION 1(21)
